From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FCCAC43215 for ; Wed, 20 Nov 2019 08:30:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 09F0822312 for ; Wed, 20 Nov 2019 08:30:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574238605; bh=JQOmElfXSzHu9Z+PGD9kkgOcTSRKyGXU0jtHg/2wKGo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=CEJJzDmcXiDqDLEL0QVKhk0k3Pu6/++EH/iMrWcT3WFwrtEg3spHFJnt2Sb5UD/KI 2XnOlvrTG/ZsoWoUZ9dfQo2GEaXYF2rw5nTFzgxdTKYxfzFol1Ow9vnETeuuzOgR/H qNjLBiAb7Vnvy6jXyKFHIDZ7cQ3SIB2JqqurQzog= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727963AbfKTIaC (ORCPT ); Wed, 20 Nov 2019 03:30:02 -0500 Received: from mail.kernel.org ([198.145.29.99]:41512 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726038AbfKTIaC (ORCPT ); Wed, 20 Nov 2019 03:30:02 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D1D9222312; Wed, 20 Nov 2019 08:30:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574238601; bh=JQOmElfXSzHu9Z+PGD9kkgOcTSRKyGXU0jtHg/2wKGo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=GtA1+jt399FcL+Wkav+tdOgD7i/XpKJjJpYB6jRyDekk3ghuztLdnTVZTyCXIqlss 6QbOU1JZ4RCt2pNmShKR98SjB/RqtkKW4vlxG/gtXLDn1GGWKKCefznlb0lwTdOJml 6Px20McEVDUMhPAkLvB9I/AbNAEpuJ050xISifU8= Date: Wed, 20 Nov 2019 09:29:58 +0100 From: Greg KH To: syzbot Cc: Benjamin Herrenschmidt , linux-kernel@vger.kernel.org, penguin-kernel@i-love.sakura.ne.jp, rafael@kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org, torvalds@linux-foundation.org Subject: Re: WARNING in kernfs_get Message-ID: <20191120082958.GB2862348@kroah.com> References: <000000000000f921ae05757f567c@google.com> <0000000000001da6b60597c2ce91@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000001da6b60597c2ce91@google.com> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 20, 2019 at 12:17:01AM -0800, syzbot wrote: > syzbot has bisected this bug to: > > commit 726e41097920a73e4c7c33385dcc0debb1281e18 > Author: Benjamin Herrenschmidt > Date: Tue Jul 10 00:29:10 2018 +0000 > > drivers: core: Remove glue dirs from sysfs earlier > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17a101cee00000 > start commit: 9a568276 Merge branch 'x86-urgent-for-linus' of git://git... > git tree: upstream > final crash: https://syzkaller.appspot.com/x/report.txt?x=146101cee00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=106101cee00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=8f59875069d721b6 > dashboard link: https://syzkaller.appspot.com/bug?extid=3dcb532381f98c86aeb1 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12657f0a400000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117728ae400000 > > Reported-by: syzbot+3dcb532381f98c86aeb1@syzkaller.appspotmail.com > Fixes: 726e41097920 ("drivers: core: Remove glue dirs from sysfs earlier") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Again, I think this should be resolved with ac43432cb1f5 ("driver core: Fix use-after-free and double free on glue directory") Is there any way to run the reproducer on a newer tree? thanks, greg k-h